Vernier surface-gage



F. JANU SCH. VERNIER SURFACE GAGE.

APPLICATION FILED NOV. 25, l9l9.

Patented Mar. 22, 1921.

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UNITED STA FELIX JANUSGH, F COLLEGE POINT, NEW YORK.

vnnNrEn SURFACE-GAGE.

Specification of Letters Patent.

Application filed November 25, 1919. Serial No. 340,564.

To all whom it may concern: a Be it known that I, FELIX J ANUSGI-I, a citlzen of the United States, and a resident of the city of College Point, county} of Queens, and State of New York, have invented certain new and useful Improvements in Vernier Surface-Gages, of which the following is a specification.

The principal object of this invention is to provide a surface gage attachment adapted to be clamped upon a blade or scale having upon one side a flat bottomed, square edged slot formed longitudinally throughout its length, and secured by a clamp bolt to a slotted supporting base. a

, Another object isinithe provision made for quickly clamping the device at any predetermined point on the scale, and securing fine adjustment by meansv of a screw operated slide having graduationsupon the face, adjacent to other graduations upon the clamp element, forming; thereby the essential elements of the Vernier, reading in thousandths of an inch or millimeters in accord ance with the spacing of the graduationsh These objects are attained by the novel construction and combination of parts hereinafter described and shown in the accompanying drawings, forming a material part of this disclosure and in which Figure l is a side elevational view showing the attachment assembled to scale, also the rotatable scriber.

Fig. 2 is a top plan view of the same.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 1.

Fig. 4 is a fragmentary rear side elevational view of the head, partially in section.

Referring to the drawings in detail, the numeral 10 designates a machinists measuring scale of a well known type having upon one side a shallow, flat bottomed straight sided groove 11 formed longitudinally along the length of the scale, the scale having the usual graduations.

A base 12 is slotted to receive the scale 10 and provided with a bolt having a hook shaped end engageable within the slot 11 and rigidly clamped together by means of the knurled nut 13.

A slidable head 14, contains a deep longitudinal edge slot 15, adapted to receive the scale 10, and is provided with a bolt 16, having a hookedend element 17 slidably secured within a recess formed within the rear wall ofv the head 14 and binding the scale 10 by means of the nut 18 engaging the bolt 16, thereby rigidly clamping the scale 10 within the slot.

A beveled projection 20, formed integral with the head 14, is provided with a line2l adjacent to and registrable with the graduations upon the scale 10.

A slide 22, having a downward extending element 23, is slidably engaged within a beveled sided groove 24 formed upon the front face of the head14, the slide having graduations 25 proportionally, diilering from, but adjacent to the graduations 26 of the head 14, forming thereby the essential elements of the vernier.

x The slide 22 is adjustable by means of threaded screw 28 secured within the forked projections 31, and extending outwardly is engaged by the adjusting nut 30 rotatably secured within the forks 31 of the slide 22, which is prevented from accidental movement by the clamp screw 32.

Anadjiistable extension 35 is pivotally secured upon the projecting arm of the slide 22, by the shoulder screw 36, and is movable thereon by the screw 38, its shoulder abutting againstthe upturned lug element 40 of the slide arm 22 through which the screw freely passes and is threaded into the arm 41 of the adjustable extension 35, it being held in'adjustment by the tension spring 42.

A scriber 45 is slidably mounted within the rotatable clamp elements 46 and 47 the latte having a reduced portion passing pivotally through the extension 35 and terminating with a screw threaded end 48, to which is fitted a clamp nut 50 providing means for rigidly securing the scriber 45 in any desired position.

In operation, the base 12 and scale 10 are placed so as to rest upon plane surface, as

that may occur between the arm 41 and lug 40 through which the body of the screw loosely passes.

If it be desired to adjust the point of the scriber a small but definite amount, as is frequently desirable in practice, after the Patented Mar. 22, 1921.

scriber has been clamped in a known or predetermined adjustment, the nut 30 is operated raising or lowering the slide and its attached parts, relative to the head, the amount of movement being indicated on the Vernier, and finally the slide is clamped by the screw 32.

Uses for this implement will be fully apable in a plane parallel to said support,

means fo actuatingsaid slide, an arm projecting at a right angle from said slide be yond said support, an extension pivoted at the end of said arm, means for limitedly turning said extension on its pivot, a spring exerting pressure between said extension and said arm adapted to take up lost motion, a scriber rotatable and slidable in said extensions, and means for clamping said scriber to said extension.

"2.7 In a surface gage, the combination witha base and a scale supported thereby, of a head slidably engaged with said scale having vernier elements, means for clamping said head to the scale at any point along its length, a slide movable in said head, carrying Vernier elements, means for adjusting said slide relative to the head, means for clamping said scale to the head, an extension pivoted to said slide, means for adjusting said extensions, a scriber slidably and rotatably engaged in said extension and means for clamping said scriber in adjustment.

3. In a surface gage, the combination with a slotted base and a raduated scale adjustably supported there y, said scale having a central longitudinal slot, of a head adjustable on said scale, a pointer carried by said head registrable with the graduations of said scale, means for clamping said head in adjustment, a slide movable in said head, and a scriber adjustably mounted on said slide.

4. In a Vernier surface gage, the combination with a combination square comprising a slotted base and an adjustable graduated scale, of ahead movable on said scale, means for registering said head with the graduations of the scale, a clamp for said head, a slide movable in said head parallel to said scale, said head and slide respectively carrying vernier elements, a scriber universally mounted in said slide, and independent means for clamping said scriber, slide and head individually when in adjustment.

In testimony whereof I have signed my name to this specification.

FELIX JANusoH. 

